The Easton X5 freehub body is designed for use with X5 hubs They will not work with the M1 hubs found on the EC, EA, Havoc and Haven wheelsets. You can choose from a SRAM XD compatible freehub body for SRAM X1 11-speed drivetrains or a HG-11 version that will work with 8-10 speed SRAM and 8-11 speed Shimano mountain drivetrains.
For Easton X5 hubs
Choice of XD and Shimano HG-11 versions
Does not include end caps
Cassette Fee Hub Body Type: Shimano 11 Speed Mountain
Cassette Body Type: Shimano/SRAM
Cassette Free Hub Body Type: SRAM XD 11/12 Spedd